Flavonol 3-O-robinobiosides and 3-O-(2″-O-α-rhamnopyranosyl)-robinobiosides from Sesuvium portulacastrum

Six new flavonol 3-O-robinobiosides and 3-O-(2″-O-α-l-rhamnopyranosyl)-robinobiosides, sesuviosides A-F, were isolated from the aerial portion of Sesuvium portulacastrum together with ecdysterone, adenosine, 2′-O-methyladenosine, and l-tryptophan. The structure elucidations were based on analyses of chemical and spectroscopic data including 1D and 2D-NMR. Sesuviosides A-F and their aglycones exhibited radical scavenging activity using DPPH and ORAC assays.